Mexico and its U.S. neighbors are planning expanded electrical trade even as President Trump continues pushing to build a border wall. New transmission links and greater use of existing connections could ease the integration of renewable energy by both countries.

Solar-powered picrogrids and battery storage are spurring hopes of a silver lining for Puerto Rico and other Caribbean islands. But cost, time pressures, and resilience may keep fossil-fueled generation front and center

Analytics from Berkeley-based WattTime precisely match new loads on a grid to the power plant that will serve them, providing estimates of carbon intensity that are up to 45 percent more accurate than regional averages. Such tools can guide cleaner charging by electric vehicles, and yield a bigger carbon reduction bang from energy efficiency measures and renewable power projects.